Microbial fermentation feed equipment and fermentation method

Abstract

The invention relates to the technical field of feed fermentation production, in particular to microbial feed fermentation equipment and a fermentation method. The microbial feed fermentation equipment comprises a fermentation barrel and a drum-type vacuum stirring tank; the fermentation method of the microbial fermented feed comprises the three steps of fermentation liquor preparation, vacuum injection of the fermentation liquor into the expanded feed and continuous fermentation of the microbial feed, air in the drum-type vacuum stirring tank is emptied, negative pressure in the tank is kept, and the fermentation liquor uniformly permeates into the expanded feed, so that the situation that the fermentation liquor stays on the surface and is not uniformly distributed is avoided; a feed puffing process causes that strains cannot survive after puffed particles are prepared at high temperature in a traditional way of fermenting raw materials. According to the invention, through secondary fermentation and re-injection of the fermentation broth, the strain activity is fully ensured, the feed is subjected to secondary fermentation, and the feed quality is comprehensively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of feed fermentation production, and particularly relates to a microbial fermentation feed device and a fermentation method. Background Art

[0002] Components such as phytic acid and non-starch polysaccharides in traditional feeds affect digestibility. Fermentation technology can effectively degrade these anti-nutritional factors, improve feed utilization rate, and reduce the purification pressure on the pond environment brought by feed feeding. Existing fermented feeds mainly ferment feed raw materials, including single feed raw material fermentation and mixed feed fermentation. The selection of fermentation raw materials has gradually developed from conventional feed raw materials (such as corn, soybean meal, rapeseed meal, cottonseed meal, etc.) to unconventional low-value raw materials (such as corn germ meal, rice bran meal, distiller's grains, tea residues, Broussonetia papyrifera leaves, etc.). However, the existing fermented feeds have the following problems:

[0003] First, after the fermented feed is made into pellets or expanded feeds, due to the low water content, the feed will not be able to continue to ferment and cannot further maintain the microbial activity in the feed.

[0004] Second, ensuring the water required to maintain continuous fermentation of microorganisms after the fermented feed is made into pellets or expanded feeds will cause the made pellet feeds or expanded feeds to be unable to form, with a high loss rate and caking.

[0005] Third, in the existing method of spraying fermentation broth on the surface of expanded feeds, the fermentation broth cannot penetrate into the interior of the expanded feeds, and the fermentation broth stays on the surface of the expanded feeds, resulting in uneven fermentation.

[0006] Fourth, the existing feeds on the market have little or no animal protein. By adding low-value fish slurry fermentation broth to improve the nutritional value of the feed, it is more beneficial for the growth of farmed animals.

[0007] Therefore, those skilled in the art have provided a microbial fermentation feed device and a fermentation method to solve the problems raised in the above background art. Summary of the Invention

[0008] To solve the above technical problems, the present invention provides a microbial fermentation feed device and a fermentation method for solving the problems that the fermented feed cannot continue to ferment and has uneven fermentation after being made into expanded feeds.

[0009] Preferably: The fermentation barrel is made by cutting, rolling and welding 304 stainless steel plates with a thickness of 1 mm. The fermentation barrel is formed by welding a cylinder and a conical funnel, with a diameter of 2 m and a height of 2.2 m. The height of the conical funnel is 0.2 m. A bracket with a height of 0.5 m is welded at the bottom of the fermentation barrel. The small end of the conical funnel is connected to a PVC pipe with a diameter of 50 mm and is equipped with a valve. The top of the fermentation barrel is covered by two semi-circular stainless steel plates with a diameter of 2.1 m under the action of a sealing rubber sleeve, leaving a 30-mm circle in the middle. Stirring blades are installed inside the fermentation barrel, and the motor is fixed outside the fermentation barrel cover and connected to the stirring blades through a stirring rod.

[0010] Preferably: The mixing tank is placed on a base. The base is 2.5 m long, 1.3 m wide and 1 m high. A 5.5-kw driving motor is installed on the base and drives two rotating shafts through a speed reducer. Four rubber rollers are installed on the rotating shafts, and the speed is adjusted to 16 revolutions per minute for the mixing tank. The mixing tank is welded by 304 stainless steel rolled plates, 3.5 m long, with a middle drum diameter of 2 m and the diameters of the two feeding ports and the discharging port at both sides being 0.8 m. The volume of the mixing tank is 5 m 3 , and it can load 2 m3 of materials at a time. Stirring blades are welded on the inner wall of the mixing tank, and there is no driving shaft on the inner wall. The tank body is driven by four rubber rollers on two rotating shafts on the outer wall of the mixing tank. When rotating forward, the stirring blades can fully mix the materials. When rotating backward, the stirring blades can push the materials to the discharging port. A 2-cm hole is drilled in the middle of the feeding port cover plate, and a metal pipe is welded, which is connected to a pressure gauge, a valve, a movable joint, and finally connected to a vacuum pump.

[0011] Preferably: Fermentation broth preparation: Add molasses, fish mince and water to the fermentation barrel in a weight ratio of 1:3:6. Add 120 g of freeze-dried lactic acid bacteria powder and 6 kg of lactic acid bacteria inorganic medium per ton of materials, and ferment in a constant temperature fermentation room at 37°C for 15 days. Stir the materials in the fermentation barrel evenly every day. After 15 days, when opening the fermentation barrel, a sour fragrance can be clearly smelled, and the fermentation broth changes from thick to clear, indicating that the fermentation is successful and the fermentation broth is obtained.

[0012] Preferably: Vacuum injection of fermentation broth into expanded feed: Prepare the expanded feed purchased from the market and the fermentation broth according to the weight ratio of 10:3. First, transfer the expanded feed to a drum-type vacuum stirring tank through a chain conveyor. Turn on the motor, and drive the drum-type vacuum stirring tank to rotate through the friction of the rubber wheels on the outer tank of the stirring tank. The expanded feed rolls in the tank as the whole stirring tank rotates. At this time, transfer the fermentation broth to the tank through a sewage pump. After the fermentation broth is injected, turn off the driving motor, stop the rotation of the tank body, seal and install the cover plate of the tank body feeding port, turn on the vacuum pump, evacuate the air in the tank, and at the same time turn on the driving motor to drive the stirring tank to roll. When the reading of the pressure gauge is at a negative pressure of 0.06 - 0.08 MPa, turn off the vacuum pump, keep the stirring tank rolling for 10 minutes, then turn off the driving motor, open the discharge port of the stirring tank, turn on the driving motor and adjust it to rotate in the reverse direction. The feed after the fermentation broth and the expanded feed are fully mixed inside and outside evenly is pushed to the discharge port under the action of the stirring blades welded on the inner surface of the stirring tank and enters the loading table.

[0013] Preferably: Continuous fermentation of microbial feed: After injecting lactic acid bacteria with a high active content into the expanded feed, the water content is increased from 10% to 30%. Transfer and quantitatively load the microbial feed into a feed bag with a breathing valve, transfer it to a constant temperature room at 37 °C, and continue to ferment for 5 days. If the sour fragrance can be clearly smelled through the breathing valve, it means the fermentation is successful.

[0014] The technical effects and advantages of the present invention:

[0015] 1. By evacuating the air in the drum-type vacuum stirring tank and maintaining a negative pressure in the tank, the fermentation broth is evenly infiltrated into the expanded feed, avoiding the fermentation broth staying on the surface and being unevenly distributed;

[0016] 2. The traditional method of fermenting raw materials in the feed expansion process makes the bacterial strains unable to survive after being made into expanded particles at high temperature. Through secondary fermentation and re-injecting the fermentation broth in the present invention, the activity of the bacterial strains is fully guaranteed, and the feed is secondarily fermented, comprehensively improving the feed quality;

[0017] 3. The microbial fermented feed processed and produced by the present invention has a water content of 30%, fully ensuring the water required for the fermentation of the bacterial strains, while also ensuring the integrity of the expanded particles, having a low loss rate in water, being convenient for feeding, having a shelf life of up to one year without growing mold, and lactic acid bacteria occupying the dominant flora in the microbial fermented feed. Description of the drawings

[0018] Figure 1 It is a structural schematic diagram of a microbial fermented feed device and a fermentation method provided by an embodiment of the present application. Detailed implementation manners

[0019] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are given for purposes of illustration and description, and are not exhaustive or limit the present invention to the disclosed form. Many modifications and variations will be obvious to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and enable those of ordinary skill in the art to understand the present invention and design various embodiments with various modifications suitable for specific purposes.

[0020] Embodiment

[0021] Please refer to Figure 1 , in this embodiment, a microbial fermentation feed equipment is provided. Specifically, the microbial fermentation feed equipment includes a fermentation barrel and a drum-type vacuum stirring tank;

[0022] The fermentation barrel: 1. The fermentation barrel is cut, rolled, and welded from 304 stainless steel plates with a thickness of 1 mm; 2. The fermentation barrel is formed by welding a cylinder and a conical funnel, with a diameter of 2 m and a height of 2.2 m, where the conical hopper has a height of 0.2 m; 3. A bracket with a height of 0.5 m is welded at the bottom of the fermentation barrel, and the small end of the conical hopper is connected to a PVC pipe with a diameter of 50 mm and is equipped with a valve; 4. The top of the fermentation barrel is covered by two semi-circular stainless steel plates with a diameter of 2.1 m under the action of a sealing rubber sleeve, leaving a 30-mm circle in the middle. Stirring blades are installed inside the fermentation barrel, and the motor is fixed outside the fermentation barrel cover and connected to the stirring blades through a stirring rod.

[0023] The drum-type vacuum stirring tank: 1. The stirring tank is placed on a base. The base is 2.5 m long, 1.3 m wide, and 1 m high. A 5.5-kw drive motor is installed on the base and drives two rotating shafts through a speed reducer. Four rubber rollers are installed on the rotating shafts, and the speed is adjusted to 16 revolutions per minute of the stirring tank; 2. The stirring tank is welded from 304 stainless steel rolled plates, 3.5 m long, with a middle drum diameter of 2 m, and the diameters of the two feeding ports and the discharging port at both ends are 0.8 m. The volume of the stirring tank is 5 m3, and it can load 2 m3 of materials at a time; 3. Stirring blades are welded on the inner wall of the stirring tank, and there is no drive shaft on the inner wall. The tank body is driven by four rubber rollers on two rotating shafts on the outer wall of the stirring tank. When rotating forward, the stirring blades can fully mix the materials, and when rotating backward, the stirring blades can push the materials to the discharging port; 4. A 2-cm hole is drilled in the middle of the feeding port cover plate, and a metal pipe is welded, which is connected to a pressure gauge, a valve, a movable interface, and finally connected to a vacuum pump.

[0024] The fermentation method of this design is as follows:

[0025] Fermentation broth preparation: Add molasses, fish mince, and water to the fermentation tank in a weight ratio of 1:3:6. Add 120 g of freeze-dried lactic acid bacteria powder and 6 kg of lactic acid bacteria inorganic medium per ton of materials. Place it in a constant-temperature fermentation chamber at 37°C and ferment for 15 days. Stir the materials in the fermentation tank evenly every day. After 15 days, when opening the fermentation tank, a sour fragrance can be clearly smelled, and the fermentation broth changes from thick to clear, indicating successful fermentation, and the fermentation broth is obtained; Injection of fermentation broth into expanded feed: Prepare the expanded feed purchased from the market and the fermentation broth in a weight ratio of 10:3. First, transfer the expanded feed to a drum-type vacuum stirring tank through a chain conveyor. Turn on the motor, and drive the drum-type vacuum stirring tank to rotate by the friction of the rubber wheels on the outer tank body of the stirring tank. The expanded feed rolls in the tank as the whole stirring tank rotates. At this time, transfer the fermentation broth to the tank through a sewage pump. After the fermentation broth is injected, turn off the drive motor and stop the rotation of the tank body. After sealing and installing the cover plate of the tank body feeding port, turn on the vacuum pump to evacuate the air in the tank. At the same time, turn on the drive motor to drive the stirring tank to roll. When the reading of the pressure gauge is between -0.06 and -0.08 MPa, turn off the vacuum pump and keep the stirring tank rolling for 10 minutes. Then turn off the drive motor, open the discharge port of the stirring tank, turn on the drive motor and adjust it to rotate in the reverse direction. The feed after the fermentation broth and the expanded feed are fully mixed inside and outside is pushed to the discharge port under the action of the stirring blades welded on the inner surface of the stirring tank and enters the loading table;

[0026] Continuous fermentation of microbial feed: After injecting lactic acid bacteria with a high active content into the expanded feed, the water content is increased from 10% to 30%. Transfer and quantitatively load the microbial feed into a feed bag with a breathing valve, transfer it to a constant-temperature room at 37°C, and continue to ferment for 5 days. If a sour fragrance can be clearly smelled through the breathing valve, it indicates successful fermentation.

[0027] Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art and related fields without creative efforts shall fall within the protection scope of the present invention. The structures, devices, and operation methods not specifically described and explained in the present invention shall be implemented according to the conventional means in the art without special instructions and limitations.

Claims

1. A microbial fermentation feed equipment, characterized in that, The microbial fermentation feed equipment includes a fermentation barrel and a drum-type vacuum stirring tank.

2. The microbial fermentation feed equipment according to claim 1, characterized in that, The fermentation barrel is made by cutting, rolling and welding 304 stainless steel plates with a thickness of 1 mm. The fermentation barrel is formed by welding a cylinder and a conical funnel. The diameter is 2 m and the height is 2.2 m, of which the conical funnel is 0.2 m high. A bracket with a height of 0.5 m is welded at the bottom of the fermentation barrel. The small end of the conical funnel is connected to a PVC pipe with a diameter of 50 mm and is equipped with a valve. The top of the fermentation barrel is covered by two semi-circular stainless steel plates with a diameter of 2.1 m under the action of a sealing rubber sleeve, leaving a 30-mm circle in the middle. Stirring blades are installed in the fermentation barrel. The motor is fixed outside the fermentation barrel cover and is connected to the stirring blades through a stirring rod.

3. A microbial fermentation feed equipment according to claim 1, characterized in that, The stirring tank is placed on a base. The base is 2.5 m long, 1.3 m wide and 1 m high. A 5.5-kw drive motor is installed on the base and drives two rotating shafts through a speed reducer. Four rubber rollers are installed on the rotating shafts, and the speed is adjusted to 16 revolutions per minute of the stirring tank. The stirring tank is welded by 304 stainless steel coil plates, 3.5 m long, with a middle drum diameter of 2 m, and the feeding and discharging ports at both sides have a diameter of 0.8 m. The volume of the stirring tank is 5 m3, and it can load 2 m3 of materials at a time. Stirring blades are welded on the inner wall of the stirring tank, and there is no drive shaft on the inner wall. The tank body is driven by four rubber rollers on two rotating shafts on the outer wall of the stirring tank. When rotating forward, the stirring blades can fully mix the materials. When rotating backward, the stirring blades can push the materials to the discharging port. A 2-cm hole is drilled in the middle of the feeding port cover plate, and a metal pipe is welded, which is connected to a pressure gauge, a valve, a movable interface, and finally connected to a vacuum pump.

4. A fermentation method provided for a microbial fermentation feed device according to claim 1, characterized in that, Fermentation liquid preparation: Molasses, fish meal and water are added to the fermentation barrel in a weight ratio of 1:3:

6. 120 g of freeze-dried lactic acid bacteria powder and 6 kg of lactic acid bacteria inorganic salt medium are added to each ton of materials. It is fermented in a constant temperature fermentation room at 37°C for 15 days. The materials in the fermentation barrel are stirred evenly every day. After 15 days, when the fermentation barrel is opened, a sour smell can be clearly smelled, and the fermentation liquid changes from thick to clear, which means the fermentation is successful and the fermentation liquid is obtained.

5. The fermentation method of a microbial fermented feed according to claim 4, characterized in that, Vacuum injection of the fermentation liquid into the expanded feed: Prepare the materials of the expanded feed purchased from the market and the fermentation liquid in a weight ratio of 10:

3. First, transfer the expanded feed to the drum-type vacuum stirring tank through a chain conveyor. Turn on the motor, and drive the drum-type vacuum stirring tank to rotate through the friction of the rubber wheels on the outer tank body of the stirring tank. The expanded feed rolls in the tank body as the whole stirring tank rotates. At this time, transfer the fermentation liquid to the tank body through a sewage pump. After the fermentation liquid is injected, turn off the drive motor and stop the rotation of the tank body. After the feeding port cover plate of the tank body is sealed and installed, turn on the vacuum pump to evacuate the air in the tank body. At the same time, turn on the drive motor to drive the stirring tank to roll. When the reading of the pressure gauge is at a negative pressure of 0.06 - 0.08 MPa, turn off the vacuum pump and keep the stirring tank rolling for 10 minutes. Then turn off the drive motor, open the discharging port of the stirring tank, turn on the drive motor and adjust it to rotate backward. The microbial feed after the fermentation liquid and the expanded feed are fully mixed inside and outside is pushed to the discharging port under the action of the stirring blades welded on the inner surface of the stirring tank and enters the loading platform.

6. The fermentation method of a microbial fermentation feed according to claim 4, characterized in that, The continuous fermentation of the microbial feed: After injecting lactic acid bacteria with a high active content into the expanded feed, the water content is increased from 10% to 30%. Transfer a quantitative amount of the microbial feed into a feed bag with a breathing valve, and transfer it to a constant temperature room at 37°C for continuous fermentation for 5 days. If the sour fragrance can be clearly smelled through the breathing valve, it means that the fermentation is successful.

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